Although you should use that as a relative pronoun
(see Use that, which, and such as correctly), avoid using it as a demonstrative
pronoun (which stands in for or points to a noun). Instead, use it as an
adjective and follow it with a noun.

Use

Avoid

Use that method.

That is the method to use.

You can also edit or delete your CNAME by managing your DNS in your
existing tool.

If you want to edit or delete your CNAME, you can also do that by
managing your DNS in your existing tool.